spadiceous /spəˈdɪʃiəs/ adjective2 •(no longer used) Of a bright clear brown or chestnut colour.Of those five [horns] which Scaliger beheld, though one spadiceous, or of a light red, and two inclining to red, yet was there not any of this complexion among them. — 1650 •(no longer used) Bearing flowers on a spadix; of similar to a spadix. formsmore spadiceous · most spadiceous